Low-pressure casting device

Abstract

The utility model discloses a low-pressure casting device which comprises a crucible, a feeding device is arranged on one side of the crucible, the other side of the crucible is connected with an adjusting device, the adjusting device comprises a fixing pipe, a matching pipe, matching holes, a rotating sleeve, a matching rod, a screw rod and a thread sleeve, the matching pipe is arranged in the fixing pipe, the matching holes are formed in the side wall of the matching pipe, and the rotating sleeve is connected with the matching rod. The matching rod is arranged in the matching pipe, the screw rod is connected to one end of the matching rod, the thread sleeve is connected to the inner side of the rotating sleeve, a fixing mechanism is arranged on the outer side of the fixing pipe, and the fixing mechanism comprises a movable plate, a spring, a fixing block, an adaptive sleeve, a limiting plate, an ejector rod, a movable block, a movable groove, a through groove, a connecting spring, an adaptive rod and an adaptive groove; the spring is connected with the fixed block and the movable block, the limiting plate is arranged on the ejector rod, the ejector rod is connected to one side of the adaptive sleeve, the through groove is formed in one end of the movable groove, one end of the adaptive rod is connected with the outer wall of the rotary sleeve through the connecting spring, and the multiple adaptive grooves are formed in the outer side of the fixed pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to foundry technology field more specifically, it relates to a low pressure casting device. BACKGROUND

[0002] In the existing low pressure casting technology field, although low pressure casting device has been widely used in the production of various high-precision castings, there are still some problems to be solved, these problems not only affect the production efficiency, but also may cause adverse effects on the quality of castings, restrict the further development and application of low pressure casting technology.

[0003] Firstly, the existing low pressure casting device generally has the problem of simple structure and single function, this simple structure design leads to complicated feeding operation, the operator needs to frequently manually adjust and monitor the feeding process, which not only increases the labor intensity, but also easily affects the casting quality due to human operation errors, for example, when adding raw materials or adjusting the feeding speed, the operator may need to adjust multiple times, which not only reduces the production efficiency, but also may affect the consistency of the castings due to frequent interruptions, increases the production cost and time.

[0004] Secondly, the inert gas pressurization method is generally used in the existing technology to push the melted metal liquid into the riser pipe to realize casting forming, however, this method has a significant defect, that is, the delivery speed of inert gas is difficult to adjust flexibly, in actual production, different castings often need different metal liquid filling speeds due to the differences in shape, size and material characteristics, fixed gas delivery speed cannot meet such diversified needs, for example, for castings with complex shape or thin-wall structure, slower filling speed may be needed to ensure that the metal liquid fully flows into all detail parts, while for castings with simple shape or thick-wall structure, faster filling speed may be needed to improve production efficiency, the gas delivery system lacking flexible adjustment capability cannot adapt to these different needs, which may lead to unstable casting quality, such as incomplete filling, porosity or cold shut defects.

[0005] To solve the above problems, some equipment manufacturers have tried to introduce a function to adjust the delivery speed of inert gas in low-pressure casting devices, however, these improvements still have obvious shortcomings, usually, these adjustment devices are simple in structure and imperfect in adjustment mechanism, this simple adjustment mechanism often shows insufficient stability in actual use, in the long production process, the adjustment device may loosen or shift due to factors such as vibration, temperature change or material fatigue, this instability may cause unexpected changes in the originally adjusted gas flow rate, thereby affecting the stability and repeatability of the casting process, more seriously, this flow rate change may occur without the operator's awareness, resulting in problems in the quality of a batch of castings, for example, if the gas flow rate suddenly increases, it may cause the metal liquid to fill too fast, causing gas to be entrained or splashed; on the contrary, if the flow rate slows down, it may cause the metal liquid to solidify too early in the mold, forming cold shuts or underfills, etc. These problems not only increase the scrap rate, but also may cause the efficiency of the entire production line to decline, as additional time is needed to inspect and adjust the equipment. Content of the utility model

[0006] (I) Technical problems solved

[0007] In view of the problems existing in the prior art, the low-pressure casting device is provided to solve the technical problems mentioned in the background art.

[0008] (II) Technical solutions

[0009] To achieve the above object, the utility model provides the following technical scheme: A low pressure casting device, including crucible, its characterized in be: the one side of crucible is provided with feeding device, the other side of crucible is connected with adjusting device, adjusting device includes fixed pipe, cooperation pipe, cooperation hole, rotating sleeve, cooperation rod, screw rod and nut, fixed pipe connects in one side of crucible, cooperation pipe is fixedly arranged in fixed pipe, multiple cooperation hole is set up in cooperation pipe side wall, rotating sleeve is rotatably connected in one side of fixed pipe, cooperation rod is slidably arranged in cooperation pipe, screw rod is connected in one end of cooperation rod, nut is fixedly connected in rotating sleeve inner side, and nut is movably connected with screw rod through thread, the outside of fixed pipe is provided with fixing mechanism, fixing mechanism includes movable plate, spring, fixed block, adapter sleeve, limit plate, jacks, movable block, movable slot, through slot, connecting spring, adapter rod and adapter groove, movable plate is rotatably sleeved on the outside of fixed pipe, and the both ends of spring are connected with fixed block and movable block respectively, fixed block is fixedly connected on the outside of fixed pipe, adapter sleeve is sleeved on the outside of fixed pipe, limit plate is arranged on jacks, jacks are connected on one side of adapter sleeve, movable block is connected on one side of movable plate, movable slot is set up on movable plate, through slot is set up on one end of movable slot, one end of adapter rod is connected with the outer wall of rotating sleeve through connecting spring, the other end of adapter rod is inserted into adapter groove, and multiple adapter grooves are set up on the outside of fixed pipe.

[0010] The utility model further sets up, cooperation pipe inside fixedly be provided with slide rail, cooperation rod outside set up have sliding slot, sliding slot with slide rail adaptation.

[0011] The utility model further sets up, the outside of fixed pipe is equipped with guide rail, the inside of adapter sleeve set up have guide groove, guide groove with guide rail adaptation.

[0012] The utility model further sets up, the outside of fixed pipe movably is equipped with reset spring, reset spring movably is sleeved on the outside of jacks, and the other end of reset spring is contact type connection with movable plate.

[0013] The utility model further sets up, feeding device includes blockage frame, feed inlet, forming assembly, sealing cover, fixed seat and push spring, fixed seat sets up in one side of crucible, feed inlet sets up in one side of crucible, blockage frame slidably sets up in one side of feed inlet, push spring is connected in one side of blockage frame, sealing cover is detachably installed on the crucible, forming assembly sets up above sealing cover, and the setting of feeding device makes the feeding operation more simple and reliable.

[0014] The utility model further sets up, be equipped with liquid storage tank in the crucible, be equipped with liquid lift pipe on the sealing cover, one end of liquid lift pipe extends into forming assembly, the other end of liquid lift pipe extends into the inside bottom end of liquid storage tank.

[0015] The utility model further provides for, one side of the crucible is equipped with support seat, support seat top is equipped with the gas storage tank, support seat one side is equipped with the air pump, both ends of air pump are equipped with the gas pipe, air pump input is connected with the gas storage tank output through the gas pipe, air pump output is connected with the rotating sleeve through the gas pipe and rotation, the setting of above -mentioned components can stably carry out the feeding operation.

[0016] The utility model further provides for, one side of the blocking frame is equipped with the clamping block, the movable frame is movably arranged on the fixed seat, the movable frame is used in cooperation with the clamping block, and the cooperation of the clamping block and the movable frame makes the use of the blocking frame more stable.

[0017] (Three) beneficial effects

[0018] Compared with the prior art, the utility model provides a low pressure casting device, has the following beneficial effects:

[0019] 1, the innovative design of feeding device effectively solves the problem of complicated feeding operation in the prior art, by setting blocking frame, feed inlet and forming assembly and other components on one side of the crucible, realize fast, safe feeding process, the sliding design of blocking frame cooperates with push spring, make the opening and closing of feed inlet become simple and fast, the cooperation of clamping block and movable frame further enhances the stability and safety of the use of blocking frame, this design not only simplifies the feeding operation, also improves production efficiency, the setting of sealing cover and rising tube ensures the smooth transmission of metal liquid between liquid storage tank and forming assembly, reduces the time of metal liquid exposed in the air, helps to maintain the quality of metal liquid, the combined design of support seat, gas storage tank and air pump provides stable gas pressure source for the whole system, ensures the continuity and controllability of the casting process.

[0020] 2, the design of adjusting device cleverly solves the problem that the conveying speed of inert gas cannot be flexibly adjusted in the prior art, through the cooperative work of fixed pipe, cooperation pipe, cooperation hole, rotating sleeve, cooperation rod, screw rod and screw sleeve and other components, realize the accurate control of inert gas conveying speed, the design of multiple cooperation holes in cooperation pipe side wall, in combination with the sliding mechanism of cooperation rod, allows the operator to change the volume of gas passing by adjusting the number of blocked cooperation holes, so as to realize the fine adjustment of conveying speed, the design of sliding rail and sliding groove ensures the stability and accuracy of cooperation rod movement, this adjustable mechanism greatly improves the adaptability of equipment, can flexibly adjust the gas conveying speed according to the needs of different castings, so as to improve the casting quality and efficiency.

[0021] 3、The introduction of the fixing mechanism further enhances the stability and reliability of the adjusting device, and the combination design of the movable plate, spring, fixed block, adapter sleeve, limiting plate, jacking rod, movable block, movable slot, through slot, connecting spring, adapter rod and adapter slot forms a multiple locking mechanism, which not only solves the problem that the adjusting mechanism is prone to looseness in the prior art, but also improves the reliability and durability of the entire system, and the rotating design of the movable plate cooperates with the spring and the fixed block and the like, so that the operation is more flexible, the adapter sleeve and the limiting plate cooperate, and the precise positioning of the movable slot and the through slot ensures the stability after adjustment, and the design of the adapter rod and the adapter slot further enhances the fixing effect of the rotating sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a low-pressure casting device in the utility model;

[0023] Figure 2 It is a schematic diagram of the overall structure of a low-pressure casting device in the utility model; Figure 1 It is a schematic diagram of the overall structure of a low-pressure casting device in the utility model;

[0024] Figure 3 It is a schematic diagram of the overall structure of a low-pressure casting device in the utility model;

[0025] Figure 4 It is a schematic diagram of the overall structure of a low-pressure casting device in the utility model;

[0026] Figure 5 It is a schematic diagram of the overall structure of a low-pressure casting device in the utility model;

[0027] Figure 6 It is a schematic diagram of the overall structure of a low-pressure casting device in the utility model; Figure 5 It is a schematic diagram of the overall structure of a low-pressure casting device in the utility model.

[0028] In the figure: 1, crucible; 2, fixed tube; 3, matching tube; 4, matching hole; 5, rotating sleeve; 6, matching rod; 7, screw rod; 8, screw sleeve; 9, movable plate; 10, spring; 11, fixed block; 12, adapter sleeve; 13, limiting plate; 14, jacking rod; 15, movable block; 16, movable slot; 17, through slot; 18, connecting spring; 19, adapter rod; 20, adapter slot; 21, sliding rail; 22, sliding groove; 23, guide rail; 24, guide groove; 25, return spring; 26, blocking frame; 27, feeding port; 28, forming assembly; 29, sealing cover; 30, fixing seat; 31, push spring; 32, liquid storage tank; 33, liquid lifting pipe; 34, support seat; 35, gas storage tank; 36, air pump; 37, air pipe; 38, clamping block; 39, movable frame. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0031] In the present application, unless otherwise specified, the directions used such as "up, down" are generally with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for the convenience of understanding and description, "left, right" is generally with respect to the left and right shown in the drawings; "inner, outer" refers to the inner and outer of the contour of each component itself, but the above directional words are not used to limit the present application.

[0032] Please refer to Figures 1-6 A low pressure casting device, including a crucible 1, characterized by: the crucible 1 side is provided with a feeding device, the other side of the crucible 1 is connected with adjusting device, adjusting device includes fixed pipe 2, cooperation pipe 3, cooperation hole 4, rotating sleeve 5, cooperation rod 6, screw rod 7 and screw sleeve 8, fixed pipe 2 is connected in one side of the crucible 1, cooperation pipe 3 is fixedly arranged in fixed pipe 2, multiple cooperation holes 4 are opened in the side wall of cooperation pipe 3, rotating sleeve 5 is rotatably connected in one side of fixed pipe 2, cooperation rod 6 is slidably arranged in cooperation pipe 3, screw rod 7 is connected in one end of cooperation rod 6, screw sleeve 8 is fixedly connected in the inner side of rotating sleeve 5, and screw sleeve 8 is movably connected with screw rod 7 through thread, the outer side of fixed pipe 2 is provided with fixing mechanism, fixing mechanism includes movable plate 9, spring 10, fixed block 11, adaptive sleeve 12, limiting plate 13, jacking rod 14, movable block 15, movable slot 16, through slot 17, connecting spring 18, adaptive rod 19 and adaptive slot 20, movable plate 9 is rotatably sleeved on the outer side of fixed pipe 2, spring 10 is connected with fixed block 11 and movable block 15 respectively at both ends, fixed block 11 is fixedly connected on the outer side of fixed pipe 2, adaptive sleeve 12 is sleeved on the outer side of fixed pipe 2, limiting plate 13 is arranged on jacking rod 14, jacking rod 14 is connected on one side of adaptive sleeve 12, movable block 15 is connected on one side of movable plate 9, movable slot 16 is opened on movable plate 9, through slot 17 is opened on one end of movable slot 16, one end of adaptive rod 19 is connected with the outer wall of rotating sleeve 5 through connecting spring 18, the other end of adaptive rod 19 is inserted into adaptive slot 20, multiple adaptive slots 20 are opened on the outer side of fixed pipe 2.

[0033] The sliding rail 21 is fixedly arranged in the cooperation pipe 3, and the sliding groove 22 is opened on the outer side of the cooperation rod 6, and the sliding groove 22 is matched with the sliding rail 21.

[0034] The guide rail 23 is arranged on the outer side of the fixed pipe 2, and the guide groove 24 is opened on the inner side of the adaptive sleeve 12, and the guide groove 24 is matched with the guide rail 23. The guide rail 23 is arranged on the outer side of the fixed pipe 2, and the guide groove 24 is opened on the inner side of the adaptive sleeve 12, and the guide groove 24 is matched with the guide rail 23.

[0035] A reset spring 25 is movably arranged outside the fixed tube 2, movably sleeved outside the top rod 14, and the other end of the reset spring 25 is in contact with the movable plate 9.

[0036] In the embodiment, when the delivery speed of the inert gas needs to be adjusted, first rotate the movable plate 9, the movable plate 9 drives the movable block 15 to move, and the movable block 15 cooperates with the fixed block 11 to extrude the spring 10, at the same time, the movable plate 9 drives the through slot 17 and the movable slot 16 to move, when the spring 10 is extruded to the limit, the movable slot 16 is just moved to the position concentric with the limiting plate 13, then push the adapter sleeve 12, the adapter sleeve 12 drives the top rod 14 and the corresponding limiting plate 13 to pass through the through slot 17, then the adapter sleeve 12 cooperates with the movable plate 9 to extrude the return spring 25, when the return spring 25 is extruded to the limit, the other limiting plate 13 just passes through the through slot 17, and the limiting plate 13 just reaches the other side of the movable plate 9, then release the movable plate 9, the spring 10 drives the movable block 15 to reset, then the movable block 15 drives the movable plate 9 to reset, then the movable plate 9 drives the through slot 17 and the movable slot 16 to reset, so that the top rod 14 enters the movable slot 16, when the spring 10 is reset, the adapter sleeve 12 is clamped on one side of the movable plate 9 through the top rod 14 and the corresponding limiting plate 13, then the outer side of the adapter rod 19 loses the limiting of the adapter sleeve 12, then rotate the rotating sleeve 5, the rotating sleeve 5 drives the adapter rod 19 to move, then the side wall of the adapter slot 20 extrudes the end of the adapter rod 19, because of the round corner structure design at the edge of the adapter rod 19 and the adapter slot 20, then one end of the adapter rod 19 slides out of the adapter slot 20, then the other end of the adapter rod 19 drives the connecting spring 18 to stretch, at the same time, the rotating sleeve 5 drives the internally connected screw sleeve 8 to rotate, because the screw sleeve 8 and the screw rod 7 are movably connected through threads, and the slide rail 21 and the slide groove 22 limit the cooperating rod 6, so that the cooperating rod 6 and the screw rod 7 do not rotate, then the screw rod 7 drives the cooperating rod 6 to slide along the slide rail 21 and the slide groove 22, so that the number of the cooperating holes 4 opened in the side wall of the cooperating pipe 3 changes, thereby changing the volume of the inert gas passing through, and further changing the delivery speed of the inert gas, after adjusting the flow rate, the connecting spring 18 drives the adapter rod 19 to be clamped into the corresponding adapter slot 20, then rotate the movable plate 9 again, the movable plate 9 drives the movable block 15 to move again, so that the movable block 15 and the fixed block 11 extrude the spring 10 again, and the movable plate 9 drives the movable slot 16 and the through slot 17 to move, when the through slot 17 moves to the position corresponding to the limiting plate 13, the return spring 25 drives the adapter sleeve 12 to reset, then the adapter sleeve 12 drives the top rod 14 and the limiting plate 13 to slide along the guide rail 23 and the guide groove 24 to reset, when the return spring 25 is completely reset, release the movable plate 9, then the spring 10 drives the movable block 15 to reset again, then the movable block 15 drives the movable plate 9 to reset, so that the movable plate 9 drives the through slot 17 and the movable slot 16 to move to the position not corresponding to the top rod 14 and the limiting plate 13, thereby making the top rod 14 and the limiting plate 13 cooperate to stably support the adapter sleeve 12, then the adapter sleeve 12 stably limits the adapter rod 19 to prevent the adapter rod 19 from moving,Then the adapter rod 19 will and the adapter groove 20 cooperation of rotating sleeve 5 stable positioning, to prevent the rotating sleeve 5 move, in turn to ensure the stability of the flow rate after adjustment.

[0037] Please refer to Figures 1-3 As an embodiment of the feeding device: the feeding device comprises a blocking frame 26, a feeding port 27, a forming assembly 28, a sealing cover 29, a fixed seat 30 and a push spring 31, the fixed seat 30 is arranged on one side of the crucible 1, the feeding port 27 is arranged on one side of the crucible 1, the blocking frame 26 is slidably arranged on one side of the feeding port 27, the push spring 31 is connected on one side of the blocking frame 26, the sealing cover 29 is detachably installed on the crucible 1, and the forming assembly 28 is arranged above the sealing cover 29.

[0038] The crucible 1 is provided with a liquid storage tank 32, and the sealing cover 29 is provided with a liquid lifting pipe 33, one end of the liquid lifting pipe 33 extending into the forming assembly 28, and the other end of the liquid lifting pipe 33 extending into the inside bottom end of the liquid storage tank 32.

[0039] One side of the crucible 1 is provided with a support seat 34, the support seat 34 is provided above with a gas storage tank 35, one side of the support seat 34 is provided with a gas pump 36, both ends of the gas pump 36 are provided with a gas pipe 37, the input end of the gas pump 36 is connected with the output end of the gas storage tank 35 through the gas pipe 37, and the output end of the gas pump 36 is rotationally connected with the rotating sleeve 5 through the gas pipe 37.

[0040] One side of the blocking frame 26 is connected with a clamping block 38, the fixed seat 30 is movably provided with a movable frame 39, and the movable frame 39 is used in cooperation with the clamping block 38.

[0041] More specifically, when the device needs to be used, first push the clamping block 38, the clamping block 38 will drive the sealing frame 26 to slide, and then the sealing frame 26 will extrude the push spring 31 arranged on one side, when the push spring 31 is extruded to the limit, rotate the movable frame 39, the groove inside the movable frame 39 will be clamped to the outside of the clamping block 38, so as to realize the limiting of the sealing frame 26, then the feeding port 27 will be exposed, then pour the heated metal liquid into the feeding port 27, then through the feeding port 27 into the liquid storage tank 32 arranged inside the crucible 1, after the feeding is completed, rotate the movable frame 39 to reset, then the clamping block 38 loses the limiting of the movable frame 39, then the push spring 31 will push the sealing frame 26 to reset, so that the sealing frame 26 seals the feeding port 27 again, then open the air pump 36, so that the air pump 36 through the air pipe 37 connected with the input end extracts the inert gas stored in the gas storage tank 35, then through the air pipe 37 connected with the output end of the air pump 36 to transport the extracted inert gas into the crucible 1, so as to realize the pressurizing operation, then the metal liquid in the liquid storage tank 32 will enter the rising liquid pipe 33, at the same time operate the molding device to close the mold, then the metal liquid in the rising liquid pipe 33 will enter the molding assembly 28 to perform molding, after molding, make the air pump 36 re-extract the inert gas in the crucible 1 and return to the gas storage tank 35, then operate the molding assembly 28 to perform demolding operation.

[0042] In summary, when the device is in use or operation: when the delivery speed of the inert gas needs to be adjusted, first rotate the movable plate 9, which will move the movable block 15, and the movable block 15 will cooperate with the fixed block 11 to press the spring 10, at the same time, the movable plate 9 will move the through slot 17 and the movable slot 16, when the spring 10 is pressed to the limit, the movable slot 16 is just moved to the position concentric with the limiting plate 13, then push the adapter sleeve 12, which will drive the top rod 14 and the corresponding limiting plate 13 through the through slot 17, then the adapter sleeve 12 will cooperate with the movable plate 9 to press the return spring 25, when the return spring 25 is pressed to the limit, the other limiting plate 13 just passes through the through slot 17, and the limiting plate 13 just reaches the other side of the movable plate 9, then release the movable plate 9, the spring 10 pushes the movable block 15 back to its original position, then the movable block 15 will drive the movable plate 9 back to its original position, then the movable plate 9 will drive the through slot 17 and the movable slot 16 back to their original positions, so that the top rod 14 enters the movable slot 16, when the spring 10 is reset, the adapter sleeve 12 will be clamped on one side of the movable plate 9 through the top rod 14 and the corresponding limiting plate 13, then the outside of the adapter sleeve 12 will lose the limiting of the adapter sleeve 12, then rotate the rotating sleeve 5, which will drive the adapter rod 19 to move, then the side wall of the adapter slot 20 will press the end of the adapter rod 19, due to the design of the round corner structure at the edge of the adapter slot 20, one end of the adapter rod 19 will slide out of the adapter slot 20, and the other end of the adapter rod 19 will drive the connecting spring 18 to stretch, at the same time, the rotating sleeve 5 will drive the internally connected screw sleeve 8 to rotate, due to the threaded connection between the screw sleeve 8 and the screw rod 7, and the limiting of the sliding rail 21 and the sliding groove 22 on the cooperating rod 6, the cooperating rod 6 and the screw rod 7 will not rotate, then the screw rod 7 will drive the cooperating rod 6 to slide along the sliding rail 21 and the sliding groove 22, so that the number of cooperating holes 4 opened on the side wall of the cooperating tube 3 changes, thereby changing the volume of the inert gas passing through, and further changing the delivery speed of the inert gas, after adjusting the flow rate, the connecting spring 18 drives the adapter rod 19 to engage into the corresponding adapter slot 20, then rotate the movable plate 9 again, which will move the movable block 15 again, so that the movable block 15 and the fixed block 11 press the spring 10 again, and the movable plate 9 will move the movable slot 16 and the through slot 17, when the through slot 17 moves to the corresponding position of the limiting plate 13, the return spring 25 pushes the adapter sleeve 12 back to its original position, then the adapter sleeve 12 will drive the top rod 14 and the limiting plate 13 to slide along the guide rail 23 and the guide groove 24 to reset, when the return spring 25 is completely reset, release the movable plate 9, then the spring 10 pushes the movable block 15 back to its original position, then the movable block 15 will drive the movable plate 9 back to its original position, so that the movable plate 9 drives the through slot 17 and the movable slot 16 to move to a position not corresponding to the top rod 14 and the limiting plate 13, thereby stably supporting the adapter sleeve 12 with the top rod 14 and the limiting plate 13, then the adapter sleeve 12 will stably limit the adapter rod 19 to prevent the adapter rod 19 from moving,Then the adapter rod 19 will cooperate with the adapter groove 20 to stabilize and limit the rotation of the rotating sleeve 5, thereby preventing the rotating sleeve 5 from moving and ensuring the stability of the flow rate adjustment.

[0043] When the device needs to be used, first push the clamping block 38, which will drive the sealing frame 26 to slide, and then the sealing frame 26 will extrude the push spring 31 arranged on one side. When the push spring 31 is extruded to the limit, rotate the movable frame 39, and the groove inside the movable frame 39 will be clamped to the outside of the clamping block 38, thereby limiting the sealing frame 26. Then the feeding port 27 will be exposed, and then the heated metal liquid will be poured into the feeding port 27, and then through the feeding port 27 into the liquid storage tank 32 arranged inside the crucible 1. After the feeding is completed, rotate the movable frame 39 to reset, and then the clamping block 38 loses the limit of the movable frame 39, and then the push spring 31 pushes the sealing frame 26 to reset, so that the sealing frame 26 seals the feeding port 27 again. Then open the air pump 36, so that the air pump 36 draws out the inert gas stored in the gas storage tank 35 through the air pipe 37 connected to the input end, and then the inert gas drawn out is delivered to the crucible 1 through the air pipe 37 connected to the output end of the air pump 36, thereby realizing the pressurization operation. Then the metal liquid in the liquid storage tank 32 will enter the liquid lifting pipe 33, and at the same time the forming device is operated to close the mold, and then the metal liquid in the liquid lifting pipe 33 will enter the forming assembly 28 to form. After forming, the air pump 36 re-pumps the inert gas in the crucible 1 back to the gas storage tank 35, and then the forming assembly 28 is operated to demold.

[0044] In all the above-mentioned schemes, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection or other known connection methods, which will not be repeated here. In the above, whenever there is a fixed connection, it is preferred to consider welding. Although embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A low-pressure casting device comprising a crucible (1), characterized in that: The crucible (1) is provided with a feeding device on one side, and an adjusting device is connected to the other side of the crucible (1), the adjusting device comprises a fixed tube (2), a matching tube (3), a matching hole (4), a rotating sleeve (5), a matching rod (6), a screw rod (7) and a screw sleeve (8), the matching tube (3) is arranged in the fixed tube (2), a plurality of matching holes (4) are arranged in the side wall of the matching tube (3), the matching rod (6) is arranged in the matching tube (3), the screw rod (7) is connected to one end of the matching rod (6), the screw sleeve (8) is connected to the inner side of the rotating sleeve (5), a fixing mechanism is arranged on the outer side of the fixed tube (2), the fixing mechanism comprises a movable plate (9), a spring (10), a fixed block (11), an adapter sleeve (12), a limiting plate (13), a jacking rod (14), a movable block (15), a movable groove (16), a through groove (17), a connecting spring (18), an adapter rod (19) and an adapter groove (20), the movable plate (9) is sleeved on the outer side of the fixed tube (2), the spring (10) is connected with the fixed block (11) and the movable block (15), the limiting plate (13) is arranged on the jacking rod (14), the jacking rod (14) is connected to one side of the adapter sleeve (12), the through groove (17) is arranged at one end of the movable groove (16), one end of the adapter rod (19) is connected with the outer wall of the rotating sleeve (5) through the connecting spring (18), and a plurality of adapter grooves (20) are arranged on the outer side of the fixed tube (2).

2. A low pressure casting apparatus according to claim 1, wherein: The matching tube (3) is fixedly provided with a sliding rail (21), and the outer side of the matching rod (6) is provided with a sliding groove (22), which is matched with the sliding rail (21).

3. The low pressure casting apparatus according to claim 1, wherein: The outer side of the fixed tube (2) is provided with a guide rail (23), and the inner side of the adapter sleeve (12) is provided with a guide groove (24), which is matched with the guide rail (23).

4. A low pressure casting apparatus according to claim 3, wherein: The outer side of the fixed tube (2) is movably provided with a reset spring (25), the reset spring (25) is movably sleeved on the outer side of the jacking rod (14), and the other end of the reset spring (25) is connected with the movable plate (9) in a contact mode.

5. A low pressure casting apparatus according to any one of claims 1 to 4, wherein: The feeding device comprises a blocking frame (26), a feeding port (27), a forming assembly (28), a sealing cover (29), a fixed seat (30) and a push spring (31), the fixed seat (30) is arranged on one side of the crucible (1), the feeding port (27) is arranged on one side of the crucible (1), the blocking frame (26) is slidably arranged on one side of the feeding port (27), the push spring (31) is connected to one side of the blocking frame (26), the sealing cover (29) is detachably installed on the crucible (1), and the forming assembly (28) is arranged above the sealing cover (29).

6. A low pressure casting apparatus according to claim 5, wherein: The crucible (1) is provided with a liquid storage tank (32), the sealing cover (29) is provided with a liquid lifting pipe (33), one end of the liquid lifting pipe (33) extends into the forming assembly (28), and the other end of the liquid lifting pipe (33) extends into the inner bottom end of the liquid storage tank (32).

7. A low pressure casting apparatus according to claim 6, wherein: The crucible (1) is provided with a supporting seat (34) on one side, an air tank (35) is installed above the supporting seat (34), an air pump (36) is arranged on one side of the supporting seat (34), air pipes (37) are connected to both ends of the air pump (36), the input end of the air pump (36) is connected with the output end of the air tank (35) through the air pipes (37), and the output end of the air pump (36) is rotationally connected with the rotating sleeve (5) through the air pipes (37).

8. A low pressure casting apparatus according to claim 7, characterised in that: The blocking frame (26) is provided with a clamping block (38) on one side, and a movable frame (39) is movably arranged on the fixed seat (30), and the movable frame (39) is used in cooperation with the clamping block (38).

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